Pipe-wrench



' s. N. HALL.

P IPE WRENCH. APPLICATION FILED MAY [0, 1917.

1,333,251. Patented M3129, 1920.

K40 INVENTOR. Samuel MI /all:

BY $144k M ATTORNEY.

Y SAM L n. HALL, OF MEMPHIsmENNEssEE.

v To all whom iii may concern:

-Be it knowntha't I, SAMUEL N. HALL, a citizen of the UnitedSta'tes, and a resident of Memphis, in the county of Shelby, State of Tennessee, have invented certainnew and useful Improvements in Piperenches; of which "the following is a speo1ficat1ont1 This invention relates to wrenches, and

particularly to pipe wrenches of the chain type, and especially the invention provides improvements in that type of a chain pipe 7 wrench in which the pipe can be turned in eral character isillustrated' and described either direction by the oppositely disposed teeth atone side of the longitudinal center of the jaw plate witht he same hitchofthe chainabout the pipe. "A wrench of this genin U. SLPatent'No; 889E246 dated June 2,

this type of wrenchis provided having a novel construction and mode of OPBlittlOll.

In the draw1ngs,

Figure 1 is a side View of a wrench e1n-;

bodying my invention, with one ofthe jaw plates removed. a

I Fig. 2 is an edge view of'a wrench in longitudinal. section.

Fig. is a view similar to Fig. 1, but with the fittings jaw attachment. u I

Fig-.1 4 is an'edge- View of theffittings jaw."

Referring to the drawings, 'a denotes "the handle, 6,1), the'jaw plates ;;c,0, theboltsby which the jaw plates are attached .to the' the boltc; ic, e', arelugs, as here shown on liandle,fcl'tl1e chain anchored atone end on the handle, for engaging the 'endsof the chain pins f. Theupper end ofthehandle isslotted to receive the-chain, as at g, and ahandle so that they will not be sprun tobushing h'ho lds the bifurcated ends of the gether by the outer fh'olding bolt "0. rom the bottom of the slot the handle is grooved,

as indicated at 'so that the link "by which; 45

the chain is anchored to the bolt 0 will lie substantially below the rear teeth 10 and f permit the chain to "be-.swung'far baclrwhen the rear teeth are being'used.

- Both edges ofeach j aw plateareproyided with a pair of oppositelyJacting iteeth"5, 10,

separated by a slight depression ll to permit V of the wrench being shifted to turn a pipe in either direction. )When the parts are in r the position's'hown in Fig. 1 with the rear teeth engaged with the pipe, the pipe will be turned. in a clockwise direction. \Yhen Specification of Letters Patent.

j. PIPE-WRENCH.

Patented Mar. 9, 1920.

Application fileil M'a 'm, 1917. Serial No.'167,822.

the front teeth 5 are engaged with alpipe it will be "turned in anti-clockwise direction.

. It is important to rememberthat it is the set of oppositely disposed teeth atone side of the longitudinal center of the p which cooperate to permit turning a pipe in eitherdirection without disengaging-the chain; this result being accomplished merely spect to the handle; that is, the longitudinal axis or the jaw plates alineswith the axis of the handle. The jaw plates, symmetrical when considered with respect totheir longitudinal centers, are not symmetr cal when V jaw plates considered with respect toftheir trans-verse V A centers,'-since the rear end of the platesis By the present nvention it'IIlOdlfiCittIOll of ing the rear set of teeth out away from the d handle, where they can be utilized without the handle getting in the wayofthe work.

This provides a well balanced wrench and one in which the set of teeth on either side I can be used without shiftingv the position of the jawplates relative .to the handle.

slope away from one another at opposite plates arespace'd apart and in many cases the fiange'of a fitting would slip in between them so that the fitting couldfnotfbe using aasepara'te wrench, I have 'proyi'ded a fittings aw which 1s lntended,primarily,

"to operate on the flange of a fitting wliich cannot be engaged by the regular jaw plates.

e0 "operated by the wrench; 'inconsequenc fand p 'y O WO1ol the necessity of 20 is the fittings jaw, positioned between the' 'f outer ends of the jaw plates,"b, b, and held byjpins 21 passing through the j aw'plates and secured by cotter pins or ,rmts; 'Tliis fittings jaw projects outwardly beyondfthe forward teeth 5, and is designed to'flengaged the flanges of pipe fittings. It is equipped with one or more engaging hooks22fto take the/pins f onthe'chain; thusobviatlng' the use of anunusuallylongchain, which would be'n'ecessary inorder to hook thechain in Ithe lugs e.

In accordance with theprovisions of the patent statutes Ihave describe'd'the principle of operation of my invention,. together with the apparatus which I now consider to repre 75 of greater width than the from end, carrysent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the in vention can be carried out by other means.

I claim as my invention 1. A jaw plate provided at each edge' with a pair of oppositely-acting teeth, one end of said jaw plate between the toothed portions on opposite sides thereof being 0 greater width than the other. 1 r

.2. A jaw plate provided with means at its rear end and on its longitudinal center for securing it to a handle, said jaw plate being of greater width at its rear end than at its front end and projecting beyond the handle and arranged so that the longitudi nal axis of the jaw plates alin'es with the axis of the handle, a pair of oppositely-acting teeth on both edges of said jaw plates, the

toothed rear edges of said plates being spaced fromthe edges of said handle, a chain having one end anchored at the end of the handle, and chain-engaging lugs on the sides of the handle near the end, said chain being adapted to cooperate with either one of the pairs of teeth on the same side of the jaw plates to grip a pipe and turn it in either direction. A v

'5. A handle with a bifurcated end, aj aw plate at each side of the handle projecting beyond the bifurcated end and arranged with its longitudinal axis alined with the axis of the handle, a chain with one end se.

'cured to the handle back of the center of the jawplates, a bolt passing through said jaw on the handle back of the center of the jaw plates for the other end of the chain, each jaw plate being provided at each edge'with a' pair of oppositely 'alined teeth; the rear teeth of each jaw plate being at a greater distance from the longitudinal center of the jaw than the front teeth.

, 6. A handle, toothed jaw plates secured to opposite sides of the'handle and projecting beyond the end thereof, an auxiliary jaw positioned between the outer. end of said jaw plates, means for supporting said auxiliary jaw from said aw plates, said auxiliary jaw projecting laterally beyond the edges of said jaw. plates and provided with engaging teeth, a chain connected at one end with said handle, and means with which the opposite end of said chain may be inter-engaged.

.7. A handle, toothed jaw plates secured to "opposite sides of the handle and projecting beyond the end thereof, an auxiliary jaw positioned between the outer end of said jaw plates, means for supporting said auxiliary jaw from said jaw plates, said auxiliary jaw projecting laterally beyond the edges of said jaw plates and provided with engaging teeth, a chain connected at one end with said handle, and means on said auxiliary jaw with which the opposite end of said chain may be engaged. r

8. A jaw plate symmetrical as to its 1011- gitudinal axis and unsymmetrical as to its transverse axis and having at. each edge a pair of oppositely acting pipe engaging surfaces. v

9. A handle, a pair of j aw plates secured,

to said handle and projecting beyond the .end of the same and so arranged that the longitudinal axes of the jaw plates alines with the axisof the handle, a pair of oppositely acting teeth on both edges of said jaw plates, the toothed rear edges of said plates being spaced from the edges of said handle, and a chain adapted to cooperate with either one of the pairs of teeth on the same side of the jaw plates to grip a, pipe and turn it in either direction.

10. A handle, a pair of jaw plates secured to the handle and projecting beyond the end of the same and each having at one edge a pair of oppositely acting pipe engaging surfaces located entirely to one side of the longitudinal axis of the handle, the rear active pipe engaging surfaces of said plates being spaced a greater distance from the longitudinal axis of the handle than are the front pipe engaging surfaces, and a chain adapted to cooperate with either the front or rear pipe engaging surfaces ofsaid plates 7 to grip a pipe and turn it in either direction.

plates and handle and on; which the end of 1 the chain is swiveled, and engaging hooksj 11. Ahandla-a pair of jaw plates secured to and projecting beyond the end of said handle and arringed so that the longitudinal axis of the jaw plates alines with the axis of the handle, a pair of oppositely acting teeth on one edge of each of said jaw plates and located entirely to one side of the longitudinal axis of said handle, the width of said jaw plates between the longitudinal axis of the handle and the rear toothed edges of the, platesbeing greater-than the width of the plates between the longitudinal axis of the handle and the front toothed edges ofsaid plates, and achain adapted to 

